Process of brewing beer of low alcoholic contents.



E. E. DEGKEBAOH.

"PROCESS or 3112mm BEBE OF LOW ALGOHOLIG comsu'rs.

APPLICATION FILED APR. 25, 1908.

Patented 13 0.6, 1910.

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acts rarnnanion.

HENRY E. nnoitnnnon, or orncrnnari. OHIO.

Trnooiiss or BREWING BEER or LOW ALCOHOLIC CONTENTS.

erases.

Specification of Letters Patent.

Application filed April 25, 1998. Serial No. 429,136.

To all whom it Be it known that I. HENRY E. DECKE- EACH, a citizen of the United States of America. and resident of Cincinnati, county of Hamilton, State of Ohio, have invented certain new and useful Improvements in Processes of Brewing Beer of Low Alcoholic Contents, of which the following is a specification. y

The object of my invention is aprocess of 'removing alcohol from wort whichis fermenting in a closed tub, of facilitating the growth of the yeast cells, and of purifying the wort. I

In the accompanying drawings in which I have illustrated an apparatus for carrying on my process, Figure 1 is a plan view of a fermenting tub and of a cooling apparatus for use in carrying on my process. Fig. 2 is a vertical sectional view taken upon irregular line of Fig. 1;

Before the wort is led into the closed tub. A. the desired amount of yeast may be placed therein through the man-hole, a,

which is thereupon closed. The wort is then'le-d from the cooler, not shown, into fermenting tub, A, through pipe, (1 It contains the usual twelve per cent. extract and is at a temperature of about forty-five degrees Fahrenheit. After the wort rises above-the heightof the pipes, B, B, the flow is out ed by means of the cock, (2- Oxygen under pressure of from five to ten pounds above that of the atmosphere and at a temperature of forty-five degrees Fahrenheit is admitted into the top of the tub through pipe. C. The exit pipe, C, should be opened to about one half the size of the inlet pipe, G, by means of the regulating cock, 0. The inner end of the exit pipe, G, stands immediately above the level of the liquid. The. fermentation is then allowed to proceed under this pressure, of five to ten pounds, and at a temperature of forty-five degrees Fahrenheit, until the amountof ex tract in the wortis reduced to about eight per cent. This fermentation proceeds at a moderate rate because of the lowered temperature of the wort. As the yeast cells rise to the surface laden with gases, they discharge them at the surface of the liquid. These gases, which are found to consist largely of alcoholic vapors and of carbonic acid gas, are carried out of the tub, by the pipe, C. Theyeast cells which have discharged their cases, take a fresh amount of oxygen and then sink to the bottom of the liquid. There isthus a constant discharge of the vapors through the pipe, 0', and a constant supply of fresh oxygen from the pipe, C. The

oxygen under pressure upon top of thewort stimulates the action ofthe yeast cells and I have found that under these conditions the proportion of carbonic acid gas to alcohol is increased. After the extract in the wort has been reduced to eight per cent., the temperature of the oxygen entering through the pipe, C, is raised to eighty degrees Fahrenheit. The fermentation in the tub, A, will then proceedmore rapidly than in the previous step because of the higher temperature, and the discharge of gases from the pipe, C,will be more rapid. This fermentation is allowed to proceed until the amount of exti hchhas been reduced to about four per cent. Titian the temperature of the oxygen entering through pipe, ,0, is reduced to thirty-eight degrees Fahrenheit, thereby checking the rate of the fermentation which is then altract has been reduced to three per cent. The amount of extract present at any time is ascertained by the use of a saccharometer, in the usual manner. After the extract has been thus reduced to three per cent, the beer is withdrawn from the surface of the fluid by means of pump, I), through the pipe, E. The pump forces the beer then through a cooler, F, thence through a strainer, G, and then through pipe, B", back to the surface of the fluid in the tub, A. Between the pump and the cooler, F, cool oxygen is forced into the wort through thepipe, (Z. The circulation of the beerthrough the cooler is continued until the wort contained in the fermenting tub has been reduced to thirty-two and one half degrees Fahrenheit. In the strainer, G, albuminoids and dead yeast cells will be retained. The beer is then found to contain less than three per cent. of alcohol. By raising the temperature of the oxygen to one hundred andtwenty degrees Fahrenheit. instead of to eighty degrees, as

By this process I am enabled to produce a) beverage which is non-intoxicating, but: in which the full flavor of beer is retained.

j no

The wort is withdrawn from the tub by means of pipe, H, and the yeast may be withdrawn by means of pipe, H. V

What I claim is:

lrThe process of brewing beer of low alcoholic contents consisting in placing it in a closed tub with its yeast, admittingv cooled oxygen under-pressure upon its sur face, "permitting it to ferment, withdrawing the gases from the surface while admitting the oxygen thereto, then after a partial fermentation admitting oxygen at a higher temperature and under pressure to the surface, while carrying the vapors due to ferimentation, from the surface.

2. The process of brewing beer of low alcoholic contents consisting in placing it in tion admitting oxygen at a higher temperature and under pressure to the surface, While carrying off the vapors due to fermentation from the surface, and then after another partial fermentation admitting oxygen of a degree lower than the first and permitting the fermentation to proceed to a full fermentation.

HENRY E. DEGKEBAOH. Witnesses:

WALTER F. MUnRAY, AGNES MGCORMACK. 

